<?php
/**
 * Zend Framework
 * LICENSE
 * This source file is subject to the new BSD license that is bundled
 * with this package in the file LICENSE.txt.
 * It is also available through the world-wide-web at this URL:
 * http://framework.zend.com/license/new-bsd
 * If you did not receive a copy of the license and are unable to
 * obtain it through the world-wide-web, please send an email
 * to license@zend.com so we can send you a copy immediately.
 * @category Zend
 * @package Zend_Validate
 * @copyright Copyright (c) 2005-2012 Zend Technologies USA Inc. (http://www.zend.com)
 * @license http://framework.zend.com/license/new-bsd New BSD License
 * @version $Id: IsImage.php 24593 2012-01-05 20:35:02Z matthew $
 */
/**
 *
 * @see Zend_Validate_File_MimeType
 */
require_once 'Zend/Validate/File/MimeType.php';

/**
 * Validator which checks if the file already exists in the directory
 * @category Zend
 * @package Zend_Validate
 * @copyright Copyright (c) 2005-2012 Zend Technologies USA Inc. (http://www.zend.com)
 * @license http://framework.zend.com/license/new-bsd New BSD License
 */
class Zend_Validate_File_IsImage extends Zend_Validate_File_MimeType {

    /**
     * @const string Error constants
     */
    const FALSE_TYPE = 'fileIsImageFalseType';

    const NOT_DETECTED = 'fileIsImageNotDetected';

    const NOT_READABLE = 'fileIsImageNotReadable';

    /**
     *
     * @var array Error message templates
     */
    protected $_messageTemplates = array(self::FALSE_TYPE => "File '%value%' is no image, '%type%' detected", self::NOT_DETECTED => "The mimetype of file '%value%' could not be detected", self::NOT_READABLE => "File '%value%' is not readable or does not exist");

    /**
     * Sets validator options
     * @param string|array|Zend_Config $mimetype
     * @return void
     */
    public function __construct ($mimetype = array()) {
        if ($mimetype instanceof Zend_Config) {
            $mimetype = $mimetype -> toArray ();
        }
        $temp = array();
        // http://de.wikipedia.org/wiki/Liste_von_Dateiendungen
        // http://www.iana.org/assignments/media-types/image/
        $default = array('application/cdf', 'application/dicom', 'application/fractals', 'application/postscript', 'application/vnd.hp-hpgl', 'application/vnd.oasis.opendocument.graphics', 'application/x-cdf', 'application/x-cmu-raster', 'application/x-ima', 'application/x-inventor', 'application/x-koan', 'application/x-portable-anymap', 'application/x-world-x-3dmf', 'image/bmp', 'image/c', 'image/cgm', 'image/fif', 'image/gif', 'image/jpeg', 'image/jpm', 'image/jpx', 'image/jp2', 'image/naplps', 'image/pjpeg', 'image/png', 'image/svg', 'image/svg+xml', 'image/tiff', 'image/vnd.adobe.photoshop', 'image/vnd.djvu', 'image/vnd.fpx', 'image/vnd.net-fpx', 'image/x-cmu-raster', 'image/x-cmx', 'image/x-coreldraw', 'image/x-cpi', 'image/x-emf', 'image/x-ico', 'image/x-icon', 'image/x-jg', 'image/x-ms-bmp', 'image/x-niff', 'image/x-pict', 'image/x-pcx', 'image/x-portable-anymap', 'image/x-portable-bitmap', 'image/x-portable-greymap', 'image/x-portable-pixmap', 'image/x-quicktime', 'image/x-rgb', 'image/x-tiff', 'image/x-unknown', 'image/x-windows-bmp', 'image/x-xpmi');
        if (is_array ($mimetype)) {
            $temp = $mimetype;
            if (array_key_exists ('magicfile', $temp)) {
                unset ($temp['magicfile']);
            }
            if (array_key_exists ('headerCheck', $temp)) {
                unset ($temp['headerCheck']);
            }
            if (empty ($temp)) {
                $mimetype += $default;
            }
        }
        if (empty ($mimetype)) {
            $mimetype = $default;
        }
        parent::__construct ($mimetype);
    }

    /**
     * Throws an error of the given type
     * Duplicates parent method due to OOP Problem with late static binding in PHP 5.2
     * @param string $file
     * @param string $errorType
     * @return false
     */
    protected function _throw ($file, $errorType) {
        $this -> _value = $file['name'];
        switch ($errorType) {
            case Zend_Validate_File_MimeType::FALSE_TYPE :
                $errorType = self::FALSE_TYPE;
                break;
            case Zend_Validate_File_MimeType::NOT_DETECTED :
                $errorType = self::NOT_DETECTED;
                break;
            case Zend_Validate_File_MimeType::NOT_READABLE :
                $errorType = self::NOT_READABLE;
                break;
        }
        $this -> _error ($errorType);
        return false;
    }

}
